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Respiratory Virus Report, Week 12 - ending March 23, 2024

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Organization: Public Health Agency of Canada

Please note that the Respiratory Virus Detection Surveillance System (RVDSS) is a sentinel laboratory surveillance system that does not capture all respiratory virus testing performed in Canada; differences may exist between the data presented in this report and provincial/territorial epidemiological reports. SARS-CoV-2 laboratory data is included in this report to facilitate the comparison of positivity with other respiratory viruses. Interpretation should be made with caution as testing practices differ among viruses.

For additional SARS-CoV-2 surveillance information, please refer to the COVID-19 epidemiology update.

Overall summary

In week 12 (week ending March 23, 2024) in Canada, participating RVDSS laboratories reported 1,601 detections of SARS-CoV-2 from 30,960 tests (5.2% positive). Among non-SARS-CoV-2 respiratory viruses, where test volumes are lower (range of 7,442 to 27,562 tests), activity of influenza is highest.

  • National SARS-CoV-2 percent positivity has been decreasing since mid-December 2023.
  • Influenza A percent positivity has decreased in recent weeks (897 detections; 3.3% positive) and is lower than influenza B which is currently stable (1,551 detections; 5.6% positive).
  • RSV percent positivity has decreased in recent weeks (581 detections; 2.4% positive).
  • Percent positivity of all other non-SARS-CoV-2 respiratory viruses is within expected levels typical of this time of year.
  • 35/35 sentinel laboratories reported surveillance data

On this page

Abbreviations:
ADV
Adenovirus
Atl
Atlantic Canada
BC
British Columbia
Can
Canada
EORLA
Eastern Ontario Regional Laboratory Association
EV/RV
Enterovirus/Rhinovirus
Flu
Influenza
Flu A(H1)pdm09
Influenza A(H1N1)pdm09
Flu A(H3)
Influenza A(H3N2)
Flu A(UnS)
Influenza A(Unsubtyped)
HCoV
Human coronavirus 229E/OC43/NL63/HKU1
HMPV
Human metapneumovirus
HPIV
Human parainfluenza virus
HSC
Health Sciences Centre
N.C.
Data not collected
N.R.
Data not reported for current week
ON
Ontario
PR
Prairies
P.H.O.L.
Public Health Ontario Laboratory
QC
Quebec
RSV
Respiratory syncytial virus
RVDSS
Respiratory Virus Detection Surveillance System
SARS-CoV-2
Severe acute respiratory syndrome coronavirus 2
Terr
Territories of Canada
UHN
University Health Network

Respiratory virus detections

Table 1: Respiratory virus detections for the week ending March 23, 2024 (surveillance week 2024-12)
Reporting Laboratory SARS-CoV-2 Tested SARS-CoV-2 Positive Flu Tested A(H1)pdm09 Positive A(H3) Positive A(UnS) Positive Total Flu A Positive Total Flu B Positive RSV Tested RSV Positive HPIV Tested HPIV 1 Positive HPIV 2 Positive HPIV 3 Positive HPIV 4 Positive Other HPIV Positive ADV Tested ADV Positive HMPV Tested HMPV Positive EV/RV Tested EV/RV Positive HCoV Tested HCoV Positive
Newfoundland 523 49 421 0 0 14 14 15 421 31 421 0 1 8 0 0 421 4 421 25 421 27 421 25
Prince Edward Island 304 30 295 0 0 3 3 44 295 9 32 0 0 3 0 0 32 1 32 3 32 3 32 2
Nova Scotia 1265 108 1250 0 0 94 94 29 1097 25 52 0 1 0 0 0 52 0 52 1 52 1 52 4
New Brunswick 1114 61 1131 12 0 29 41 97 1131 39 87 0 0 6 0 0 87 3 87 4 87 12 87 5
Atlantic 3206 248 3097 12 0 140 152 185 2944 104 592 0 2 17 0 0 592 8 592 33 592 43 592 36
Région Nord-Est 1260 33 1152 0 0 26 26 81 606 48 71 1 0 2 0 0 71 2 69 3 N.C. N.C. 71 14
Québec-Chaudière-Appalaches 1292 27 1068 0 0 31 31 105 1008 28 417 1 0 3 0 0 440 5 417 31 N.C. N.C. 283 13
Centre-du-Québec 1835 34 1657 0 0 69 69 99 653 24 24 0 0 2 0 0 24 1 24 4 N.C. N.C. 24 1
Montréal-Laval 1997 39 2363 0 0 91 91 72 1291 38 729 0 1 23 0 0 729 11 732 31 N.C. N.C. 729 38
Ouest du Québec 1069 23 672 0 0 35 35 23 666 12 13 0 0 1 0 0 13 1 13 1 N.C. N.C. 13 0
Montérégie 1155 38 1420 0 0 52 52 34 1416 30 8 0 0 0 0 0 8 0 8 0 N.C. N.C. 8 0
Province of Québec 8608 194 8332 0 0 304 304 414 5640 180 1262 2 1 31 0 0 1285 20 1263 70 N.C. N.C. 1128 66
P.H.O.L. - Ottawa 302 76 291 1 0 13 14 5 291 0 140 0 0 0 0 13 140 1 140 9 140 3 140 32
EORLA 855 27 524 0 0 22 22 46 524 7 36 0 0 4 0 0 36 0 36 2 36 7 36 4
P.H.O.L. - Kingston 156 10 124 3 2 2 7 0 124 0 89 0 0 0 0 15 89 0 89 8 89 2 89 16
UHN / Mount Sinai Hospital 950 22 622 0 0 5 5 5 622 5 123 0 0 4 0 0 123 1 123 4 123 8 123 2
P.H.O.L. - Toronto 330 13 894 15 5 13 30 17 894 4 862 0 0 0 0 65 862 16 862 65 862 55 862 111
Sick Kids Hospital - Toronto 111 4 109 2 1 0 3 6 109 2 109 0 0 7 2 0 109 7 109 7 109 19 109 5
Shared Hospital Laboratory 1820 33 1438 18 4 5 27 47 1439 2 1424 0 0 0 0 11 1424 10 1433 27 1433 39 1433 20
P.H.O.L. - Sault Ste. Marie 13 2 16 1 0 0 1 1 16 0 12 0 0 0 0 0 12 0 12 0 12 0 12 3
P.H.O.L. - Timmins 33 10 28 0 0 3 3 3 28 0 12 0 0 0 0 0 12 0 12 0 12 2 12 4
St. Joseph's - London 821 27 633 0 0 13 13 15 633 1 79 0 0 0 0 4 79 2 79 8 79 5 79 5
P.H.O.L. - London 233 18 216 9 0 1 10 9 216 1 204 0 0 0 0 13 204 1 204 12 204 18 204 17
P.H.O.L. - Orillia 2 0 2 0 0 0 0 0 2 0 2 0 0 0 0 1 2 1 2 0 2 0 2 0
P.H.O.L. - Thunder Bay 46 4 38 0 0 0 0 0 38 1 27 0 0 0 0 0 27 1 27 1 27 1 27 8
P.H.O.L. - Sudbury 30 1 34 1 0 1 2 0 34 1 24 0 0 0 0 5 24 0 24 6 24 1 24 6
P.H.O.L. - Hamilton 122 24 159 3 0 0 3 1 159 0 137 0 0 0 0 5 137 3 137 19 137 17 137 11
P.H.O.L. - Peterborough 61 1 77 2 0 1 3 10 77 0 56 0 0 0 0 6 56 0 56 6 56 6 56 2
St. Joseph's - Hamilton 1701 51 1633 0 0 79 79 69 1633 8 1633 0 0 48 0 0 1633 15 1633 67 1633 88 0 0
Sault Area Hospital 187 8 123 1 3 4 8 2 123 2 97 1 0 4 0 0 97 2 97 7 97 4 97 7
Province of Ontario 7773 331 6961 56 15 162 230 236 6962 34 5066 1 0 67 2 138 5066 60 5075 248 5075 275 3442 253
Manitoba 1380 123 905 1 1 9 11 79 905 25 112 2 0 3 0 0 112 2 105 5 112 8 105 14
Saskatchewan 1605 80 1231 0 0 43 43 175 985 52 375 0 0 17 0 0 375 7 375 20 375 26 375 22
Alberta 4524 262 4325 24 13 0 39 351 4088 100 1047 2 1 53 0 0 1046 4 984 1 1038 73 1047 68
Prairies 7509 465 6461 25 14 52 93 605 5978 177 1534 4 1 73 0 0 1533 13 1464 26 1525 107 1527 104
British Columbia 3559 347 2451 27 24 0 110 65 2338 70 777 1 2 37 5 0 777 25 777 50 753 90 753 44
Yukon 33 2 27 0 0 0 1 1 27 0 N.C. N.C. N.C. N.C. N.C. N.C. N.C. N.C. N.C. N.C. N.C. N.C. N.C. N.C.
Northwest Territories 40 2 41 0 0 0 0 2 41 1 N.C. N.C. N.C. N.C. N.C. N.C. 41 1 41 0 41 3 N.C. N.C.
Nunavut 232 12 192 5 2 0 7 43 192 15 N.C. N.C. N.C. N.C. N.C. N.C. N.C. N.C. N.C. N.C. N.C. N.C. N.C. N.C.
Territories 305 16 260 5 2 0 8 46 260 16 N.C. N.C. N.C. N.C. N.C. N.C. 41 1 41 0 41 3 N.C. N.C.
CANADA 30960 1601 27562 125 55 658 897 1551 24122 581 9231 8 6 225 7 138 9294 127 9212 427 7986 518 7442 503

The data in the RVDSS report represent surveillance data available at the time of writing. Data missing from the current week are denoted by N.R. Data not collected by reporting lab denoted by N.C.

Some specimens from Yukon (YT) are sent to reference laboratories in British Columbia and reported results reflect specimens identified as originating from YT.

Results from British Columbia comprise of specimens from the following sites: Children's and Women's Hospital Laboratory, Fraser Health Medical Microbiology Laboratory, Island Health, Providence Health Care, Vancouver Coastal Health sites, Victoria General Hospital, BCCDC Public Health Laboratory, Interior Health Authority sites and Northern Health Authority sites.

Due to different testing protocols of laboratories across Canada, influenza A subtype detection counts may not be included in total influenza A detection counts. Total influenza A and B positive counts are used to calculate percentage of tests positive.

Delays in the reporting of data may cause data to change retrospectively.

Table 2: Cumulative respiratory virus detections from August 27, 2023 to March 23, 2024 (surveillance weeks 2023-35 to 2024-12)
Reporting Laboratory SARS-CoV-2 Tested SARS-CoV-2 Positive Flu Tested A(H1)pdm09 Positive A(H3) Positive A(UnS) Positive Total Flu A Positive Total Flu B Positive RSV Tested RSV Positive HPIV Tested HPIV 1 Positive HPIV 2 Positive HPIV 3 Positive HPIV 4 Positive Other HPIV Positive ADV Tested ADV Positive HMPV Tested HMPV Positive EV/RV Tested EV/RV Positive HCoV Tested HCoV Positive
Newfoundland 18695 2757 13663 0 0 1313 1313 83 13663 888 13663 16 65 31 100 0 13663 230 13663 258 13663 1097 13663 332
Prince Edward Island 6996 758 4459 0 0 538 538 150 4459 359 497 3 0 4 8 0 496 28 486 16 496 123 480 24
Nova Scotia 43265 8257 29732 0 0 2525 2525 299 24587 1385 1054 16 3 4 10 0 1054 39 1047 8 1054 218 1053 15
New Brunswick 33084 3812 30685 889 25 1872 2786 557 30281 1809 2684 7 4 13 28 0 2684 100 2684 62 2684 517 2684 111
Atlantic 102040 15584 78539 889 25 6248 7162 1089 72990 4441 17898 42 72 52 146 0 17897 397 17880 344 17897 1955 17880 482
Région Nord-Est 51273 7009 45807 5 0 4681 4686 489 18190 1356 2302 16 12 19 16 0 2302 99 2251 83 N.C. N.C. 2302 94
Québec-Chaudière-Appalaches 60329 9279 39392 0 0 5394 5394 951 37833 2535 15146 22 9 28 13 0 15602 479 15146 436 N.C. N.C. 12443 403
Centre-du-Québec 74846 12348 36136 0 0 4365 4365 606 21342 1555 1109 15 8 17 7 0 1109 55 1109 49 N.C. N.C. 1138 43
Montréal-Laval 89854 13806 72743 5 2 6453 6460 385 47118 2790 24942 94 40 191 24 0 24942 481 25012 534 N.C. N.C. 24942 846
Ouest du Québec 49494 9990 20981 4 0 2007 2011 221 20778 1078 576 11 3 13 7 0 576 43 576 17 N.C. N.C. 576 26
Montérégie 47861 7975 38592 0 0 3140 3140 220 37516 1733 210 1 0 0 1 0 210 7 210 3 N.C. N.C. 210 3
Province of Québec 373657 60407 253651 14 2 26040 26056 2872 182777 11047 44285 159 72 268 68 0 44741 1164 44304 1122 N.C. N.C. 41611 1415
P.H.O.L. - Ottawa 10407 3676 7187 284 54 184 399 28 7181 130 4288 0 0 0 0 102 4288 13 4286 75 4288 418 4286 228
EORLA 38474 4447 17888 0 0 1559 1559 292 17888 1115 1168 2 5 21 4 0 1143 13 1168 25 1168 214 1168 36
P.H.O.L. - Kingston 7134 2049 3992 131 19 96 220 4 3992 168 2803 0 0 0 0 63 2803 11 2803 22 2803 328 2803 95
UHN / Mount Sinai Hospital 32814 2999 20479 41 10 532 583 68 20479 219 1269 0 0 18 2 0 1269 2 1269 7 1269 60 1269 43
P.H.O.L. - Toronto 18263 5397 32882 1146 905 338 1741 215 32873 1043 30116 0 0 0 0 954 30124 354 30101 587 30116 2820 30101 1463
Sick Kids Hospital - Toronto 3843 305 3448 105 98 20 223 44 3448 309 3448 15 12 72 21 0 3448 92 3448 93 3448 607 3448 103
Shared Hospital Laboratory 52451 4508 44218 830 518 287 1635 324 44225 1335 44007 0 0 0 0 289 38353 319 44073 235 44118 1449 44095 494
P.H.O.L. - Sault Ste. Marie 436 188 530 50 3 16 63 1 530 45 372 0 0 0 0 5 372 1 372 0 372 21 372 38
P.H.O.L. - Timmins 1087 325 1070 58 10 30 87 5 1070 61 841 0 0 0 0 22 841 4 841 8 841 52 841 30
St. Joseph's - London 26680 3444 14379 0 0 961 961 194 14379 711 2007 0 0 0 0 26 2026 32 2026 31 2028 227 2026 55
P.H.O.L. - London 14037 4091 10386 482 141 161 599 85 10383 469 8321 0 0 0 0 232 8321 36 8319 95 8321 716 8319 317
P.H.O.L. - Orillia 550 144 1237 71 17 11 99 0 1234 74 1172 0 0 0 0 31 1172 16 1172 18 1172 145 1172 24
P.H.O.L. - Thunder Bay 1784 498 1109 57 0 8 37 5 1106 30 928 0 0 0 0 27 928 6 928 28 928 57 928 25
P.H.O.L. - Sudbury 701 239 832 40 1 22 63 1 830 23 579 0 0 0 0 19 580 1 579 8 579 45 579 39
P.H.O.L. - Hamilton 6935 2096 5694 142 65 87 240 34 5693 172 4281 0 0 0 0 135 4281 80 4280 96 4281 553 4280 191
P.H.O.L. - Peterborough 2214 666 2249 206 204 70 150 24 2239 221 1781 0 0 0 0 61 1781 36 1781 35 1781 285 1781 53
St. Joseph's - Hamilton 57453 5745 50985 0 0 3126 3126 583 50985 1752 50985 0 0 416 0 0 50985 322 50985 561 50985 2926 0 0
Sault Area Hospital 5683 775 3809 174 17 55 246 14 3802 198 2986 27 0 18 17 0 2937 35 2937 19 2937 251 2947 63
Province of Ontario 280946 41592 222374 3817 2062 7563 12031 1921 222337 8075 161352 44 17 545 44 1966 155652 1373 161368 1943 161435 11174 110415 3297
Manitoba 48854 7143 36629 143 12 1827 1982 301 36629 1329 2816 2 10 21 41 0 2816 121 3584 135 2816 519 3584 123
Saskatchewan 62658 7216 42575 117 10 5368 5495 1298 38187 1516 13755 30 9 75 23 0 13755 270 13755 743 13755 1317 13755 336
Alberta 163310 19490 141647 11742 744 582 13139 2644 132167 6003 38960 132 91 438 3 0 38949 455 37775 29 38347 3505 38959 939
Prairies 274822 33849 220851 12002 766 7777 20616 4243 206983 8848 55531 164 110 534 67 0 55520 846 55114 907 54918 5341 56298 1398
British Columbia 115295 15574 115277 4025 785 255 8456 826 112518 5726 27078 113 172 264 174 0 27080 826 26965 1024 25984 3965 25961 760
Yukon 1628 178 1064 34 15 0 60 5 1055 46 N.C. N.C. N.C. N.C. N.C. N.C. N.C. N.C. N.C. N.C. N.C. N.C. N.C. N.C.
Northwest Territories 1147 72 1087 166 6 1 173 47 1087 168 N.C. N.C. N.C. N.C. N.C. N.C. 888 44 888 9 1087 131 N.C. N.C.
Nunavut 4006 341 2821 431 32 52 515 103 2821 426 N.C. N.C. N.C. N.C. N.C. N.C. N.C. N.C. N.C. N.C. N.C. N.C. N.C. N.C.
Territories 6781 591 4972 631 53 53 748 155 4963 640 N.C. N.C. N.C. N.C. N.C. N.C. 888 44 888 9 1087 131 N.C. N.C.
CANADA 1153541 167597 895664 21378 3693 47936 75069 11106 802568 38777 306144 522 443 1663 499 1966 301778 4650 306519 5349 261321 22566 252165 7352

The data in the RVDSS report represent surveillance data available at the time of writing. Data not collected by reporting lab denoted by N.C.

Some specimens from Yukon (YT) are sent to reference laboratories in British Columbia and reported results reflect specimens identified as originating from YT.

Results from British Columbia comprise of specimens from the following sites: Children's and Women's Hospital Laboratory, Fraser Health Medical Microbiology Laboratory, Island Health, Providence Health Care, Vancouver Coastal Health sites, Victoria General Hospital, BCCDC Public Health Laboratory, Interior Health Authority sites and Northern Health Authority sites.

Due to different testing protocols of laboratories across Canada, influenza A subtype detection counts may not be included in total influenza A detection counts. Total influenza A and B positive counts are used to calculate percentage of tests positive.

Delays in the reporting of data may cause data to change retrospectively. Due to these delays, the sum of weekly report totals do not add up to cumulative totals.

Positive respiratory virus tests historical comparison

Figure 1: Positive severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2), influenza, and respiratory syncytial virus tests (%) reported by participating laboratories in Canada by surveillance week compared to average and range from 2014-2015 to 2019-2020 season
Figure 1

Shaded area represents the maximum and minimum % of respiratory virus tests positive reported by week from seasons 2014-2015 to 2019-2020

Note: Changes to testing practices during the COVID-19 pandemic may cause substantial changes to indicator estimates from previous years. Collection of laboratory testing practice meta-data to understand these changes is ongoing. Interpret trends with caution.

Note: SARS-CoV-2 surveillance was integrated into RVDSS at the beginning of the 2022-2023 season; no prior data is available for historical comparison.

Note: Data from week 11 of the 2019-2020 season onwards are excluded from the historical comparison due to the COVID-19 pandemic.

Figure 1: Positive severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2), influenza, and respiratory syncytial virus tests (%) reported by participating laboratories in Canada by surveillance week compared to average and range from 2014-2015 to 2019-2020 season
Week Week end 2023-2024 SARS-CoV-2% 2022-2023 SARS-CoV-2% 2023-2024 A% 2022-2023 A% 2021-2022 A% Max A% Base Min A% Base Av A% Base 2023-2024 B% 2022-2023 B% 2021-2022 B% Max B% Base Min B% Base Av B% Base 2023-2024 RSV% 2022-2023 RSV% 2021-2022 RSV% Max RSV% Base Min RSV% Base Av RSV% Base
35 2023-09-02 14.40 13.40 0.69 0.18 0.04 1.60 0.11 0.67 0.06 0.02 0.00 0.28 0.00 0.14 0.58 1.12 4.43 1.34 0.38 0.61
36 2023-09-09 15.92 13.07 0.43 0.14 0.01 2.11 0.23 0.99 0.06 0.04 0.00 0.55 0.00 0.15 0.71 1.12 6.61 1.09 0.22 0.62
37 2023-09-16 16.49 12.74 0.48 0.23 0.03 1.59 0.35 0.87 0.03 0.01 0.00 0.19 0.04 0.12 0.82 1.06 7.59 1.37 0.38 0.65
38 2023-09-23 18.60 13.62 0.51 0.48 0.00 2.15 0.43 1.17 0.02 0.02 0.00 0.21 0.00 0.14 1.15 1.47 7.16 1.24 0.37 0.67
39 2023-09-30 19.59 14.44 0.51 0.67 0.01 2.65 0.50 1.52 0.09 0.03 0.00 0.29 0.09 0.18 1.14 2.14 8.48 1.29 0.51 0.72
40 2023-10-07 19.81 15.06 0.64 0.96 0.00 2.17 1.01 1.58 0.05 0.03 0.02 0.20 0.05 0.11 1.35 2.54 8.53 1.39 0.34 0.71
41 2023-10-14 17.55 16.59 0.49 1.42 0.03 2.66 1.05 1.56 0.03 0.01 0.03 0.36 0.03 0.16 1.80 3.65 9.54 1.74 0.58 1.03
42 2023-10-21 17.78 15.39 0.73 2.36 0.03 2.96 0.77 1.92 0.08 0.05 0.02 0.45 0.05 0.25 2.38 4.63 8.18 2.11 0.63 1.25
43 2023-10-28 17.89 15.78 1.16 5.47 0.03 5.19 0.68 2.59 0.10 0.03 0.02 0.55 0.06 0.23 3.25 6.76 8.11 2.16 0.55 1.41
44 2023-11-04 17.74 13.91 2.63 10.75 0.10 8.32 1.08 3.35 0.10 0.03 0.10 0.71 0.12 0.31 4.07 7.77 7.82 3.35 0.83 2.07
45 2023-11-11 18.17 12.43 4.93 16.19 0.07 9.83 1.18 4.19 0.14 0.04 0.06 0.97 0.22 0.44 5.12 7.68 7.03 4.43 1.29 2.71
46 2023-11-18 18.80 11.96 7.24 20.23 0.10 13.89 1.42 5.43 0.16 0.05 0.06 1.49 0.09 0.57 5.85 7.54 7.18 6.33 1.38 3.60
47 2023-11-25 19.31 11.76 8.81 24.27 0.13 15.25 1.25 6.91 0.12 0.04 0.07 2.13 0.13 0.80 6.81 6.66 8.10 8.69 1.79 4.79
48 2023-12-02 18.03 12.12 11.62 24.04 0.19 18.07 0.76 9.40 0.26 0.03 0.15 3.18 0.08 1.20 6.99 6.87 8.92 9.47 3.11 6.08
49 2023-12-09 17.53 12.61 14.74 21.12 0.23 19.13 1.43 11.34 0.29 0.06 0.05 4.21 0.19 1.60 7.38 7.29 10.09 12.26 5.40 7.54
50 2023-12-16 17.78 13.10 15.32 17.31 0.23 26.42 1.97 13.93 0.36 0.06 0.02 7.50 0.15 2.48 7.26 8.61 10.78 13.19 6.42 8.55
51 2023-12-23 16.81 14.09 16.78 12.50 0.18 28.53 2.27 16.69 0.45 0.05 0.02 10.44 0.19 3.30 7.29 9.16 8.97 15.23 7.40 9.92
52 2023-12-30 15.35 15.53 18.18 7.93 0.09 33.97 3.30 20.32 0.52 0.07 0.01 12.58 0.23 4.04 7.41 10.59 6.72 17.80 7.89 10.97
1 2024-01-06 14.51 15.03 14.49 4.54 0.08 30.93 4.58 19.59 0.60 0.07 0.00 10.34 0.22 3.87 7.10 10.34 5.26 15.62 8.37 10.84
2 2024-01-13 13.03 13.38 11.16 2.21 0.11 26.80 5.46 19.11 0.56 0.05 0.01 11.01 0.29 3.91 6.26 9.07 4.32 14.05 7.45 10.24
3 2024-01-20 11.35 12.21 10.28 1.40 0.04 28.20 9.13 18.95 0.79 0.14 0.01 12.75 0.35 4.70 6.13 8.43 3.42 15.56 7.90 10.95
4 2024-01-27 10.19 11.30 11.10 0.91 0.05 27.01 12.34 18.82 1.08 0.14 0.00 12.74 0.41 5.17 5.85 7.96 2.33 15.88 8.38 11.89
5 2024-02-03 9.34 11.51 11.28 0.76 0.03 23.66 15.78 19.15 1.48 0.28 0.01 14.84 0.41 5.77 5.91 7.15 2.19 16.33 8.77 12.14
6 2024-02-10 8.79 11.88 10.37 0.67 0.04 23.36 15.68 18.80 1.74 0.34 0.01 16.23 0.44 6.22 5.21 5.78 2.10 15.79 7.98 12.32
7 2024-02-17 8.12 11.79 9.43 0.57 0.02 24.22 15.48 18.53 2.18 0.29 0.00 17.02 0.35 6.56 4.49 5.13 2.16 15.53 8.42 11.89
8 2024-02-24 7.49 11.73 8.01 0.57 0.06 28.62 12.42 18.57 3.17 0.49 0.02 16.79 0.45 6.61 4.78 4.53 2.12 15.47 8.04 11.28
9 2024-03-02 7.03 11.18 6.72 0.63 0.12 29.30 11.04 18.13 4.03 0.70 0.00 15.45 0.74 6.25 3.79 3.70 2.50 15.62 7.59 10.52
10 2024-03-09 6.24 11.41 5.55 0.63 0.16 29.65 8.51 16.84 5.12 0.77 0.00 14.86 0.81 6.42 3.64 2.80 3.10 14.97 6.92 9.92
11 2024-03-16 6.13 11.58 4.33 0.52 0.26 24.27 6.74 14.55 5.34 1.15 0.01 13.11 1.05 6.86 3.19 2.18 3.71 12.11 6.29 9.33
12 2024-03-23 5.17 11.28 3.25 0.59 0.86 20.91 5.51 12.68 5.63 1.29 0.00 11.53 1.51 7.43 2.41 1.98 3.79 10.70 6.46 8.59
Figure 2: Positive tests (%) of other respiratory viruses reported by participating laboratories in Canada by surveillance week compared to average and range from 2014-2015 to 2019-2020 season
Figure 2

Shaded area represents the maximum and minimum % of respiratory virus tests positive reported by week from seasons 2014-2015 to 2019-2020

Note: Changes to testing practices during the COVID-19 pandemic may cause substantial changes to indicator estimates from previous years. Collection of laboratory testing practice meta-data to understand these changes is ongoing. Interpret trends with caution.

Note: Data from week 11 of the 2019-2020 season onwards are excluded from the historical comparison due to the COVID-19 pandemic.

Note: % Tests Positive scale changes across the dashed line

Figure 2: Positive tests (%) of other respiratory viruses reported by participating laboratories in Canada by surveillance week compared to average and range from 2014-2015 to 2019-2020 season
Week Week end 2023-2024 EV/RV% 2022-2023 EV/RV% 2021-2022 EV/RV% Max EV/RV% Base Min EV/RV% Base Av EV/RV% Base 2023-2024 HPIV% 2022-2023 HPIV% 2021-2022 HPIV% Max HPIV% Base Min HPIV% Base Av HPIV% Base 2023-2024 ADV% 2022-2023 ADV% 2021-2022 ADV% Max ADV% Base Min ADV% Base Av ADV% Base 2023-2024 HMPV% 2022-2023 HMPV% 2021-2022 HMPV% Max HMPV% Base Min HMPV% Base Av HMPV% Base 2023-2024 HCoV% 2022-2023 HCoV% 2021-2022 HCoV% Max HCoV% Base Min HCoV% Base Av HCoV% Base
35 2023-09-02 12.50 15.47 21.96 27.19 22.44 24.71 1.99 2.80 5.99 3.16 1.15 2.44 1.62 2.28 1.18 1.74 0.99 1.43 0.34 1.80 0.23 2.04 0.10 0.78 0.28 0.53 1.05 0.76 0.18 0.45
36 2023-09-09 14.85 16.22 18.59 30.69 23.30 26.31 1.49 3.21 4.93 3.31 1.35 2.32 1.52 2.18 1.15 2.85 1.42 1.87 0.39 1.81 0.24 0.84 0.10 0.48 0.42 0.38 0.62 0.38 0.12 0.22
37 2023-09-16 18.29 21.73 27.46 33.58 27.74 31.69 1.60 3.02 5.97 3.26 1.65 2.40 1.47 2.10 0.81 2.44 1.38 1.86 0.39 1.38 0.17 1.61 0.00 0.51 0.23 0.28 0.44 0.56 0.00 0.26
38 2023-09-23 20.25 23.50 33.19 39.57 32.80 35.83 1.77 2.42 4.73 2.87 1.92 2.33 0.93 1.58 0.82 2.04 1.11 1.63 0.38 1.61 0.37 1.43 0.06 0.48 0.46 0.32 0.67 1.36 0.06 0.43
39 2023-09-30 18.52 22.89 30.01 40.59 34.87 37.68 1.32 3.09 8.12 3.01 1.70 2.24 1.15 2.21 1.14 2.27 1.04 1.66 0.51 1.43 0.17 0.72 0.05 0.29 0.28 0.59 0.62 0.66 0.07 0.45
40 2023-10-07 17.45 19.32 26.26 41.29 33.00 35.43 1.34 3.69 8.19 3.28 1.90 2.43 1.41 1.79 1.31 2.25 1.39 1.82 0.32 1.49 0.16 0.92 0.05 0.34 0.26 0.93 0.57 1.08 0.22 0.59
41 2023-10-14 15.74 16.70 22.91 33.62 26.94 29.93 1.28 3.52 10.46 3.70 1.96 2.75 1.38 2.03 1.37 1.91 1.28 1.70 0.37 1.66 0.20 0.95 0.04 0.46 0.32 0.99 1.69 0.70 0.00 0.34
42 2023-10-21 13.12 12.95 22.16 32.62 24.54 27.86 1.59 4.22 10.01 3.89 2.64 3.21 1.43 1.65 2.54 2.39 1.47 1.86 0.46 1.58 0.15 0.89 0.15 0.40 0.17 1.16 1.07 1.18 0.20 0.49
43 2023-10-28 12.52 11.05 19.64 28.73 21.67 24.95 1.21 4.41 9.38 3.98 3.18 3.54 1.48 1.79 1.15 2.42 1.63 1.96 0.46 1.79 0.36 1.64 0.12 0.58 0.38 1.86 1.05 2.35 0.27 0.75
44 2023-11-04 10.83 10.23 21.45 23.82 16.75 21.38 1.44 4.14 10.28 4.81 2.94 3.72 1.76 2.02 1.42 2.88 1.18 2.21 0.55 1.79 0.77 1.08 0.23 0.48 0.37 2.54 2.21 2.59 0.21 0.88
45 2023-11-11 10.70 7.77 22.39 23.08 15.17 20.56 1.65 3.90 9.97 5.42 2.53 4.01 1.45 1.99 1.63 2.68 2.02 2.42 0.60 2.06 0.64 1.30 0.04 0.77 0.42 3.00 2.57 2.74 0.52 0.96
46 2023-11-18 8.64 6.93 21.37 22.77 15.28 19.24 1.39 3.97 8.29 5.72 1.62 4.14 2.03 1.87 2.51 2.90 1.99 2.52 0.79 1.89 0.99 1.43 0.18 0.81 0.65 3.54 2.99 3.32 0.46 1.25
47 2023-11-25 7.62 4.88 18.54 20.84 12.15 16.09 1.55 3.63 7.04 7.00 2.36 4.72 1.90 1.89 1.94 2.95 1.83 2.35 1.00 1.78 1.01 2.02 0.09 0.90 0.65 3.24 3.90 3.26 0.37 1.25
48 2023-12-02 6.79 4.74 16.64 16.72 12.69 13.84 1.51 3.04 5.78 6.14 3.03 4.18 2.15 1.87 1.89 3.34 1.66 2.49 0.91 1.86 1.48 1.94 0.31 1.09 0.76 3.94 4.94 4.30 1.00 2.04
49 2023-12-09 6.00 4.09 14.57 16.32 10.72 13.07 1.39 3.03 3.97 5.65 2.94 4.19 1.83 1.68 2.48 3.03 1.84 2.50 1.20 1.93 1.22 2.80 0.49 1.48 1.12 4.48 6.58 5.19 0.84 2.53
50 2023-12-16 5.90 4.58 12.40 13.85 8.43 10.91 1.46 2.98 3.23 5.95 2.54 4.22 2.00 2.29 2.72 3.13 1.49 2.42 1.31 1.92 1.08 3.32 0.46 1.68 1.47 5.13 7.26 6.04 1.54 3.16
51 2023-12-23 5.56 4.49 9.95 14.18 8.81 10.48 1.35 3.09 3.01 6.71 2.94 3.95 1.55 1.76 2.54 3.20 1.36 2.04 1.59 2.23 1.20 4.39 0.37 2.47 1.77 5.28 8.11 6.68 1.87 3.72
52 2023-12-30 4.71 4.50 7.71 14.41 6.24 9.26 1.35 3.32 2.13 5.08 2.87 3.75 1.76 1.80 1.92 2.59 1.20 1.76 1.76 2.75 1.00 3.81 0.41 2.49 2.48 4.73 10.33 6.73 2.78 4.73
1 2024-01-06 4.80 4.19 5.71 11.09 4.36 7.42 1.48 3.63 1.84 5.08 2.68 3.34 1.48 1.88 1.84 2.67 0.85 1.54 2.20 2.94 0.72 4.45 0.28 2.74 3.06 4.40 9.27 7.77 3.07 5.16
2 2024-01-13 4.43 4.71 3.98 9.55 4.31 6.79 1.17 3.24 1.19 4.12 2.46 3.05 1.25 1.87 1.13 2.15 0.87 1.37 1.64 2.61 0.38 4.76 0.42 2.69 3.19 4.01 7.46 7.89 2.84 5.45
3 2024-01-20 4.59 6.68 3.12 8.42 4.44 6.01 1.08 2.92 0.76 3.25 2.59 2.82 1.11 1.97 1.34 2.10 1.15 1.45 2.20 2.56 0.24 5.56 0.47 3.18 3.90 3.46 4.97 7.90 4.17 6.11
4 2024-01-27 4.37 8.22 2.60 9.04 4.89 6.41 1.16 2.78 0.64 3.12 1.77 2.55 1.56 2.35 1.18 1.83 1.11 1.49 2.11 2.71 0.23 5.19 0.55 3.05 5.19 2.63 3.92 7.86 3.79 6.09
5 2024-02-03 5.02 8.94 3.02 9.79 6.06 6.94 1.45 2.70 0.48 3.48 1.70 2.39 1.62 2.44 1.57 1.93 1.36 1.62 2.27 2.96 0.25 5.70 0.58 3.34 5.10 3.20 2.83 8.49 4.55 6.84
6 2024-02-10 6.26 9.97 3.86 9.89 6.16 6.98 1.56 2.68 0.51 2.89 1.57 2.19 1.84 2.14 1.44 1.74 1.25 1.51 2.54 3.73 0.42 5.57 0.65 3.48 6.80 2.64 3.01 8.57 3.48 6.75
7 2024-02-17 6.18 9.87 4.46 8.95 6.00 7.04 1.54 2.63 0.44 3.20 1.42 2.11 1.22 2.31 1.52 1.61 1.30 1.51 2.82 4.41 0.44 6.05 1.45 3.96 7.73 3.14 3.24 8.02 4.35 6.52
8 2024-02-24 6.21 9.55 6.31 8.35 5.20 6.94 1.84 2.55 0.73 3.21 1.31 2.25 1.30 2.86 1.85 2.00 1.38 1.66 3.15 4.29 0.53 5.74 1.19 4.19 8.28 3.07 3.67 8.29 4.21 6.61
9 2024-03-02 6.48 9.77 7.80 9.03 5.73 7.75 2.40 3.07 0.60 3.35 1.41 2.44 1.65 2.75 1.90 1.92 1.09 1.40 3.92 4.72 0.40 6.42 1.87 4.46 7.09 3.41 3.32 8.01 5.09 6.87
10 2024-03-09 6.53 9.42 8.24 10.16 5.53 8.08 2.74 2.77 0.68 4.18 1.19 2.69 1.31 2.79 1.98 2.23 1.50 1.78 4.57 5.05 0.51 6.74 2.26 4.94 6.84 3.71 3.86 8.34 4.28 6.99
11 2024-03-16 6.68 8.77 8.97 9.45 7.15 8.22 3.47 3.48 0.66 4.58 1.35 3.00 1.26 2.39 1.88 2.32 1.23 1.69 4.89 5.07 0.59 7.94 2.52 4.87 7.22 3.70 3.25 8.02 4.35 6.23
12 2024-03-23 6.49 9.31 9.52 10.26 8.58 9.63 4.16 2.98 1.05 4.95 1.26 3.33 1.37 2.60 1.71 2.13 1.82 1.96 4.64 5.40 0.77 6.69 3.65 5.35 6.76 4.50 4.38 6.99 3.95 5.67

Positive severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) tests

Figure 3: Positive severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) tests (%) in Canada by region by surveillance week
Figure 3

Note: Differences in positivity between jurisdictions can reflect differences in testing practices. Please interpret with caution.

Figure 3: Positive severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) tests (%) in Canada by region by surveillance week
Week Week end Can Tests SARS-CoV-2% Atl Tests SARS-CoV-2% QC Tests SARS-CoV-2% ON Tests SARS-CoV-2% Pr Tests SARS-CoV-2% BC Tests SARS-CoV-2% Terr Tests SARS-CoV-2%
35 2023-09-02 25656 14.40 2110 16.92 9351 16.30 6230 12.39 5192 10.59 2651 18.03 122 11.48
36 2023-09-09 28237 15.92 2346 20.20 10215 17.37 6939 15.46 5968 11.90 2640 16.70 129 17.05
37 2023-09-16 31790 16.49 2567 18.62 11678 18.11 7337 15.66 6948 12.12 3111 20.64 149 10.07
38 2023-09-23 36264 18.60 2775 18.38 13455 20.48 8514 18.38 7969 14.23 3377 22.59 174 10.34
39 2023-09-30 40587 19.59 3126 22.65 15431 21.30 9291 17.86 8658 15.65 3895 23.59 186 12.90
40 2023-10-07 42173 19.81 3544 24.41 15684 22.19 9349 17.61 9198 15.96 4202 20.75 196 12.24
41 2023-10-14 38463 17.55 3583 20.74 12605 18.30 8426 15.27 9625 16.77 4047 19.13 177 14.69
42 2023-10-21 39350 17.78 3493 19.70 12590 18.63 9300 16.86 10040 17.16 3737 17.13 190 17.37
43 2023-10-28 37286 17.89 3095 17.74 12003 18.29 9276 19.35 9450 17.05 3262 14.87 200 17.50
44 2023-11-04 38183 17.74 2965 17.91 11975 18.42 9060 17.09 10341 18.12 3648 15.98 194 15.98
45 2023-11-11 38722 18.17 3122 20.12 11815 19.90 9607 18.24 10448 16.98 3545 14.41 185 10.81
46 2023-11-18 41432 18.80 3186 22.47 13182 20.21 10470 20.36 11134 16.80 3245 12.14 215 5.12
47 2023-11-25 42304 19.31 3490 22.35 12938 21.52 10880 22.17 11422 15.57 3385 11.96 189 6.35
48 2023-12-02 44713 18.03 3648 21.98 14100 22.18 11174 20.06 11903 12.58 3639 10.31 249 7.63
49 2023-12-09 46876 17.53 3654 20.17 14467 22.78 11644 18.67 12452 12.41 4272 10.30 387 6.98
50 2023-12-16 48215 17.78 4065 18.60 15835 23.97 12142 18.69 12089 11.16 3746 10.25 338 6.21
51 2023-12-23 48372 16.81 4353 15.81 16682 22.12 11548 18.73 11472 9.91 3952 10.55 365 9.86
52 2023-12-30 46997 15.35 4234 14.67 15739 19.65 11522 17.68 10314 9.95 4930 8.64 258 5.04
1 2024-01-06 48060 14.51 4471 12.68 15874 17.71 11545 16.83 10577 10.62 5300 9.57 293 7.17
2 2024-01-13 44189 13.03 4333 11.98 13921 14.75 11346 14.29 9475 9.91 4862 12.48 252 6.35
3 2024-01-20 38190 11.35 3750 10.64 11599 11.60 9942 12.87 8591 9.92 4141 10.92 167 4.19
4 2024-01-27 37089 10.19 3784 9.49 11052 9.79 9238 11.40 8358 8.95 4459 11.89 198 4.04
5 2024-02-03 36771 9.34 3908 8.75 10995 8.58 9011 9.75 8265 9.56 4420 10.63 172 5.81
6 2024-02-10 34740 8.79 3499 8.80 10544 7.33 8519 8.48 8042 10.12 3940 10.74 196 7.14
7 2024-02-17 35098 8.12 3185 8.92 11071 6.64 8901 7.48 8021 9.21 3722 11.04 198 7.07
8 2024-02-24 34146 7.49 3098 8.23 10925 5.10 8078 6.82 7890 8.66 3872 12.45 283 10.25
9 2024-03-02 33779 7.03 2992 7.02 10468 4.88 8299 6.21 7831 8.42 3972 11.76 217 6.45
10 2024-03-09 32484 6.24 3112 7.42 9479 3.46 7884 4.67 7845 7.71 3860 12.31 304 6.25
11 2024-03-16 32416 6.13 3346 6.90 9376 3.03 7702 5.47 7795 7.36 3904 11.63 293 7.51
12 2024-03-23 30960 5.17 3206 7.74 8608 2.25 7773 4.26 7509 6.19 3559 9.75 305 5.25

Positive influenza (Flu) tests

Figure 4: Positive influenza (Flu) tests (%) in Canada by region by surveillance week
Figure 4
Figure 4: Positive influenza (Flu) tests (%) in Canada by region by surveillance week
Week Week end Can Tests Can A% Can B% Atl Tests Atl A% Atl B% QC Tests QC A% QC B% ON Tests ON A% ON B% Pr Tests Pr A% Pr B% BC Tests BC A% BC B% Terr Tests Terr A% Terr B%
35 2023-09-02 14543 0.69 0.06 984 0.00 0.00 3339 0.24 0.15 4324 0.39 0.09 3654 0.57 0.00 2158 2.46 0.00 84 2.38 0.00
36 2023-09-09 15430 0.43 0.06 1047 0.00 0.00 3649 0.19 0.03 4455 0.31 0.09 4069 0.37 0.05 2117 1.46 0.09 93 0.00 0.00
37 2023-09-16 18035 0.48 0.03 1216 0.08 0.00 4174 0.41 0.07 5145 0.29 0.00 4705 0.40 0.04 2703 1.29 0.04 92 0.00 0.00
38 2023-09-23 20121 0.51 0.02 1388 0.07 0.00 4734 0.30 0.00 5652 0.21 0.05 5325 0.62 0.02 2928 1.47 0.00 94 0.00 0.00
39 2023-09-30 21529 0.51 0.09 1403 0.14 0.07 4847 0.21 0.08 6186 0.37 0.11 5370 0.48 0.11 3598 1.36 0.06 125 0.00 0.00
40 2023-10-07 23658 0.64 0.05 1775 0.34 0.00 5628 0.37 0.04 6456 0.31 0.00 5803 0.74 0.16 3878 1.60 0.05 118 0.00 0.00
41 2023-10-14 23208 0.49 0.03 1938 0.57 0.00 4978 0.22 0.06 6283 0.30 0.00 6067 0.73 0.05 3828 0.73 0.03 114 0.00 0.00
42 2023-10-21 24067 0.73 0.08 2029 0.69 0.05 5110 0.37 0.02 6834 0.47 0.07 6370 1.13 0.13 3599 1.06 0.11 125 0.00 0.00
43 2023-10-28 23268 1.16 0.10 1979 0.96 0.00 5450 0.64 0.11 6814 0.50 0.06 5872 2.33 0.17 3039 1.45 0.10 114 0.88 0.00
44 2023-11-04 25317 2.63 0.10 1914 1.25 0.05 5705 0.63 0.07 6996 0.51 0.06 6996 6.80 0.17 3562 2.58 0.11 144 2.08 0.00
45 2023-11-11 26520 4.93 0.14 2069 2.03 0.14 5970 0.84 0.07 7240 1.22 0.07 7656 12.87 0.26 3460 3.96 0.14 125 4.00 0.00
46 2023-11-18 28583 7.24 0.16 2219 3.11 0.09 6454 1.36 0.09 7797 2.68 0.15 8734 18.14 0.26 3258 3.59 0.12 121 2.48 0.00
47 2023-11-25 29879 8.81 0.12 2521 4.60 0.04 6561 2.04 0.06 8070 2.69 0.02 9078 21.15 0.28 3517 6.43 0.09 132 15.15 0.00
48 2023-12-02 32859 11.62 0.26 2743 4.89 0.11 7199 3.78 0.15 8447 4.45 0.17 10485 24.44 0.47 3836 10.79 0.21 149 38.93 0.00
49 2023-12-09 34573 14.74 0.29 2817 9.66 0.11 8141 7.14 0.12 8466 7.08 0.21 11298 26.93 0.57 3590 13.12 0.11 261 49.81 0.00
50 2023-12-16 38612 15.32 0.36 3363 12.73 0.09 10087 11.63 0.12 9265 8.47 0.41 11116 24.56 0.71 4496 14.23 0.16 285 56.49 0.00
51 2023-12-23 40839 16.78 0.45 3820 19.08 0.31 12090 15.38 0.12 9246 11.39 0.51 10656 21.67 0.91 4747 16.64 0.29 280 40.36 0.00
52 2023-12-30 42481 18.18 0.52 3874 20.99 0.36 13501 19.37 0.07 9830 15.02 0.63 9719 17.61 1.24 5352 18.89 0.24 205 46.34 0.00
1 2024-01-06 43260 14.49 0.60 4132 17.91 0.36 13858 17.30 0.22 9869 11.67 0.54 9519 11.29 1.45 5634 14.55 0.39 248 33.47 0.00
2 2024-01-13 40233 11.16 0.56 3864 15.79 0.31 12702 15.32 0.19 9980 9.08 0.59 8491 5.94 1.33 4963 9.83 0.32 233 15.88 0.43
3 2024-01-20 35211 10.28 0.79 3422 14.23 0.94 11099 14.72 0.36 8812 8.65 0.45 7341 4.09 2.07 4397 9.71 0.34 140 5.71 0.00
4 2024-01-27 35174 11.10 1.08 3461 14.59 1.36 11277 17.65 0.28 8274 8.87 0.59 7261 2.31 2.91 4722 10.67 0.87 179 2.79 0.00
5 2024-02-03 35522 11.28 1.48 3608 14.61 2.02 12036 19.09 0.61 7738 8.30 1.02 7380 1.91 3.20 4626 8.58 1.25 134 2.24 2.99
6 2024-02-10 33996 10.37 1.74 3230 12.38 1.98 11857 18.01 1.05 7402 7.23 1.50 7229 1.77 3.28 4119 7.99 1.24 159 0.00 3.14
7 2024-02-17 33917 9.43 2.18 2882 8.78 2.74 11966 16.61 1.53 7689 7.40 1.87 7229 1.58 3.62 4006 6.81 1.40 145 1.38 11.03
8 2024-02-24 33294 8.01 3.17 2914 7.41 2.88 11748 14.22 2.63 7190 6.38 2.35 7029 1.07 5.65 4225 5.80 1.82 188 0.53 9.57
9 2024-03-02 32543 6.72 4.03 2834 7.13 4.13 11373 10.92 4.28 7133 5.72 2.90 6806 1.59 5.80 4231 5.25 1.96 166 2.41 13.25
10 2024-03-09 31699 5.55 5.12 2826 7.01 6.37 10775 8.84 5.27 6873 4.89 4.09 6834 1.29 6.63 4160 4.33 2.81 231 2.16 9.96
11 2024-03-16 29729 4.33 5.34 3170 6.03 4.95 9011 6.10 5.39 6948 3.94 3.80 6295 1.45 8.15 4077 4.42 3.63 228 0.44 8.77
12 2024-03-23 27562 3.25 5.63 3097 4.91 5.97 8332 3.65 4.97 6961 3.30 3.39 6461 1.44 9.36 2451 4.49 2.65 260 3.08 17.69

Positive respiratory syncytial virus (RSV) tests

Figure 5: Positive respiratory syncytial virus (RSV) tests (%) in Canada by region by surveillance week
Figure 5
Figure 5: Positive respiratory syncytial virus (RSV) tests (%) in Canada by region by surveillance week
Week Week end Can Tests RSV% Atl Tests RSV% QC Tests RSV% ON Tests RSV% Pr Tests RSV% BC Tests RSV% Terr Tests RSV%
35 2023-09-02 13610 0.58 969 0.00 2540 1.14 4324 0.81 3535 0.20 2158 0.32 84 1.19
36 2023-09-09 14361 0.71 1047 0.57 2750 1.64 4455 0.88 3915 0.18 2101 0.24 93 0.00
37 2023-09-16 16808 0.82 1201 0.25 3181 1.67 5138 1.01 4494 0.38 2702 0.41 92 1.09
38 2023-09-23 18782 1.15 1381 1.30 3652 2.27 5652 1.43 5075 0.37 2928 0.51 94 0.00
39 2023-09-30 20217 1.14 1392 0.79 3788 2.38 6186 1.42 5128 0.43 3598 0.56 125 0.00
40 2023-10-07 22042 1.35 1761 0.28 4333 2.75 6456 1.95 5496 0.36 3878 0.72 118 0.00
41 2023-10-14 21748 1.80 1927 0.83 3897 3.70 6281 2.48 5701 0.63 3828 1.04 114 0.00
42 2023-10-21 22479 2.38 2015 0.69 3889 4.78 6834 3.72 6017 0.58 3599 1.25 125 0.00
43 2023-10-28 21745 3.25 1970 1.78 4234 6.24 6814 4.21 5574 1.22 3039 1.74 114 0.00
44 2023-11-04 23657 4.07 1904 2.15 4506 6.88 6997 5.80 6544 1.79 3562 2.36 144 2.78
45 2023-11-11 24764 5.12 2058 2.77 4680 7.97 7241 7.62 7201 2.14 3459 3.58 125 6.40
46 2023-11-18 26517 5.85 2195 2.41 4910 10.14 7796 7.91 8237 2.87 3258 4.27 121 7.44
47 2023-11-25 27491 6.81 2363 4.70 4975 11.82 8068 8.66 8508 3.24 3445 5.28 132 11.36
48 2023-12-02 30258 6.99 2549 5.88 5533 11.46 8447 8.49 9797 3.57 3783 6.66 149 8.72
49 2023-12-09 31232 7.38 2665 7.69 5930 11.11 8465 7.40 10436 4.53 3475 9.35 261 6.90
50 2023-12-16 34607 7.26 3004 8.46 7537 9.73 9261 5.99 10173 5.17 4347 9.50 285 10.53
51 2023-12-23 35988 7.29 3258 9.45 8774 9.14 9244 4.64 9820 6.47 4615 9.36 277 6.14
52 2023-12-30 37639 7.41 3431 8.57 9849 7.53 9829 4.62 9130 8.48 5196 9.49 204 15.69
1 2024-01-06 37934 7.10 3630 9.12 9953 7.31 9871 4.03 8828 7.56 5404 9.88 248 13.71
2 2024-01-13 35286 6.26 3383 9.16 9029 6.14 9975 3.27 7930 7.65 4737 7.81 232 17.67
3 2024-01-20 30825 6.13 2936 9.91 7837 5.82 8808 2.99 6890 8.21 4214 6.76 140 20.00
4 2024-01-27 30616 5.85 3067 10.01 7786 5.48 8260 2.62 6810 6.83 4514 7.35 179 24.02
5 2024-02-03 30446 5.91 3235 9.52 7985 5.07 7736 2.12 6932 8.18 4426 7.32 132 24.24
6 2024-02-10 29075 5.21 2949 10.07 7832 4.60 7404 1.62 6794 6.74 3937 6.27 159 20.75
7 2024-02-17 29028 4.49 2610 8.12 7969 4.56 7689 1.16 6769 6.04 3846 4.91 145 27.59
8 2024-02-24 28918 4.78 2715 7.18 8169 4.55 7190 1.14 6600 6.83 4057 5.57 187 29.41
9 2024-03-02 28626 3.79 2712 6.42 8150 3.99 7134 1.23 6368 4.35 4096 4.32 166 26.51
10 2024-03-09 27633 3.64 2700 6.52 7381 4.09 6873 0.89 6406 3.59 4043 3.96 230 33.91
11 2024-03-16 26113 3.19 3019 5.13 6088 3.66 6948 0.88 5895 3.43 3935 3.66 228 21.05
12 2024-03-23 24122 2.41 2944 3.53 5640 3.19 6962 0.49 5978 2.96 2338 2.99 260 6.15

Positive human parainfluenza virus (HPIV) tests

Figure 6: Positive human parainfluenza virus (HPIV) tests (%) in Canada by region by surveillance week
Figure 6
Figure 6: Positive human parainfluenza virus (HPIV) tests (%) in Canada by region by surveillance week
Week Week End Can Tests HPIV% Atl Tests HPIV% QC Tests HPIV% ON Tests HPIV% Pr Tests HPIV% BC Tests HPIV%
35 2023-09-02 6234 1.99 362 1.38 847 3.90 3406 1.85 984 1.02 635 2.05
36 2023-09-09 6321 1.49 355 1.69 868 2.19 3420 1.43 1133 0.97 545 1.65
37 2023-09-16 7419 1.60 401 2.49 1053 2.18 3886 1.34 1326 1.06 753 2.66
38 2023-09-23 8139 1.77 430 2.79 1122 2.85 4366 1.74 1445 0.90 776 1.42
39 2023-09-30 8627 1.32 401 1.25 1117 1.88 4948 1.33 1415 1.06 746 0.94
40 2023-10-07 8791 1.34 467 3.43 1178 2.04 4850 1.20 1541 0.39 755 1.85
41 2023-10-14 8879 1.28 491 1.63 1094 1.37 4898 1.16 1638 1.04 758 2.24
42 2023-10-21 9281 1.59 498 2.21 1050 1.52 5293 1.51 1707 1.46 733 2.18
43 2023-10-28 9085 1.21 474 1.48 1063 1.98 5223 0.96 1656 0.85 669 2.69
44 2023-11-04 9496 1.44 492 2.24 1067 2.06 5215 1.00 1938 1.24 784 3.57
45 2023-11-11 9826 1.65 467 2.78 1257 1.83 5242 1.11 2076 1.35 784 5.10
46 2023-11-18 10441 1.39 500 2.20 1426 1.33 5505 1.24 2191 0.87 819 3.42
47 2023-11-25 10872 1.55 620 1.77 1442 1.04 5708 1.47 2195 1.18 907 3.53
48 2023-12-02 11676 1.51 676 2.37 1587 1.32 5967 1.39 2463 1.10 983 2.95
49 2023-12-09 11621 1.39 668 1.65 1630 1.10 6040 1.44 2537 1.14 746 2.14
50 2023-12-16 12631 1.46 730 1.92 1664 0.72 6696 1.36 2459 1.46 1082 2.96
51 2023-12-23 12648 1.35 768 1.56 1857 0.54 6421 1.46 2408 0.79 1194 3.02
52 2023-12-30 12871 1.35 709 1.55 2004 0.85 6809 1.29 2168 0.97 1181 3.13
1 2024-01-06 13434 1.48 812 1.72 2046 0.59 7059 1.60 2288 1.18 1229 2.69
2 2024-01-13 13182 1.17 924 1.73 1882 0.53 7137 1.16 2111 1.09 1128 1.95
3 2024-01-20 11421 1.08 704 1.28 1843 0.49 6099 1.18 1772 1.13 1003 1.30
4 2024-01-27 11007 1.16 834 0.72 1793 0.28 5677 1.41 1707 1.41 996 1.31
5 2024-02-03 11179 1.45 794 1.26 1833 0.55 5534 1.66 1933 1.86 1085 1.29
6 2024-02-10 10714 1.56 782 0.77 1832 0.49 5194 1.73 1937 1.55 969 3.30
7 2024-02-17 10731 1.54 619 1.29 1863 0.54 5369 1.42 1898 2.32 982 2.75
8 2024-02-24 10456 1.84 632 0.47 1825 1.59 5115 1.82 1905 2.20 979 2.55
9 2024-03-02 10419 2.40 587 1.02 1800 1.11 5157 2.83 1793 2.90 1082 2.40
10 2024-03-09 9896 2.74 483 2.69 1681 1.84 4982 2.65 1748 3.66 1002 3.09
11 2024-03-16 9615 3.47 626 1.92 1299 2.08 5071 3.45 1623 4.99 996 3.92
12 2024-03-23 9231 4.16 592 3.21 1262 2.69 5066 4.11 1534 5.08 777 5.79

Positive adenovirus (ADV) tests

Figure 7: Positive adenovirus (ADV) tests (%) in Canada by region by surveillance week
Figure 7
Figure 7: Positive adenovirus (ADV) tests (%) in Canada by region by surveillance week
Week Week End Can Tests ADV% Atl Tests ADV% QC Tests ADV% ON Tests ADV% Pr Tests ADV% BC Tests ADV%
35 2023-09-02 6238 1.62 362 1.93 851 2.70 3406 0.91 984 2.44 635 2.52
36 2023-09-09 6332 1.52 355 1.97 879 2.28 3420 0.82 1133 2.03 545 3.30
37 2023-09-16 7438 1.47 401 2.00 1071 2.43 3887 0.90 1326 1.96 753 1.86
38 2023-09-23 8149 0.93 429 1.17 1134 1.06 4365 0.62 1445 1.59 776 1.16
39 2023-09-30 8614 1.15 401 1.00 1129 2.04 4923 0.69 1415 1.63 746 2.01
40 2023-10-07 8809 1.41 467 2.36 1195 2.85 4851 0.66 1541 1.69 755 2.78
41 2023-10-14 8913 1.38 491 1.63 1111 3.42 4915 0.75 1638 1.47 758 2.11
42 2023-10-21 9286 1.43 498 1.20 1058 3.59 5292 0.76 1705 1.47 733 3.27
43 2023-10-28 9099 1.48 474 2.74 1077 3.62 5223 0.69 1656 1.63 669 2.99
44 2023-11-04 9514 1.76 492 2.03 1085 3.87 5215 1.04 1938 2.12 784 2.55
45 2023-11-11 9843 1.45 467 2.57 1274 2.98 5242 0.92 2076 1.64 784 1.40
46 2023-11-18 10452 2.03 500 4.60 1437 4.31 5505 0.94 2191 1.92 819 4.03
47 2023-11-25 10920 1.90 620 2.74 1461 3.97 5712 1.07 2194 1.50 911 3.84
48 2023-12-02 11737 2.15 676 3.25 1613 3.84 5967 1.36 2462 2.03 983 3.05
49 2023-12-09 11699 1.83 668 2.84 1652 3.75 6041 1.18 2537 1.26 746 3.62
50 2023-12-16 12719 2.00 730 2.19 1681 3.09 6696 1.78 2459 1.67 1082 2.40
51 2023-12-23 12035 1.55 768 1.82 1875 2.61 5726 0.89 2408 1.45 1194 3.02
52 2023-12-30 10983 1.76 709 2.12 2010 2.49 4852 0.80 2167 1.43 1181 4.74
1 2024-01-06 11675 1.48 812 1.11 2050 2.20 5219 0.75 2288 1.14 1229 4.15
2 2024-01-13 12078 1.25 924 1.52 1901 2.31 5943 0.59 2111 1.33 1126 2.49
3 2024-01-20 11459 1.11 704 1.56 1851 1.19 6091 0.64 1772 1.35 1003 2.89
4 2024-01-27 11062 1.56 834 2.88 1807 2.32 5675 0.78 1706 1.64 996 3.41
5 2024-02-03 11223 1.62 794 2.90 1841 2.55 5534 0.74 1933 1.55 1085 3.59
6 2024-02-10 10761 1.84 782 3.45 1852 2.59 5192 0.67 1935 1.45 969 5.88
7 2024-02-17 10779 1.22 619 1.29 1875 1.97 5369 0.60 1898 1.16 982 2.95
8 2024-02-24 10526 1.30 632 2.06 1837 2.01 5115 0.80 1905 0.89 979 2.96
9 2024-03-02 10484 1.65 587 4.26 1822 2.25 5157 1.01 1793 1.06 1082 2.87
10 2024-03-09 9988 1.31 483 1.86 1708 1.70 4982 0.78 1747 1.55 1002 2.30
11 2024-03-16 9668 1.26 626 1.44 1319 1.82 5072 0.79 1622 1.48 996 2.41
12 2024-03-23 9294 1.37 592 1.35 1285 1.56 5066 1.18 1533 0.85 777 3.22

Positive human metapneumovirus (HMPV) tests

Figure 8: Positive human metapneumovirus (HMPV) tests (%) in Canada by region by surveillance week
Figure 8
Figure 8: Positive human metapneumovirus (HMPV) tests (%) in Canada by region by surveillance week
Week Week End Can Tests HMPV% Atl Tests HMPV% QC Tests HMPV% ON Tests HMPV% Pr Tests HMPV% BC Tests HMPV%
35 2023-09-02 6260 0.34 362 0.00 848 1.42 3407 0.21 1008 0.10 635 0.16
36 2023-09-09 6354 0.39 355 0.28 867 1.38 3423 0.20 1164 0.26 545 0.37
37 2023-09-16 7455 0.39 401 0.50 1053 0.76 3886 0.36 1362 0.07 753 0.53
38 2023-09-23 8194 0.38 429 0.00 1124 1.07 4365 0.14 1500 0.13 776 1.42
39 2023-09-30 8680 0.51 401 0.25 1118 0.89 4948 0.36 1467 0.34 746 1.34
40 2023-10-07 8828 0.32 457 0.44 1180 0.76 4853 0.14 1583 0.32 755 0.66
41 2023-10-14 8911 0.37 484 0.00 1096 1.00 4915 0.20 1658 0.12 758 1.32
42 2023-10-21 9321 0.46 498 0.20 1050 1.33 5298 0.32 1742 0.17 733 1.09
43 2023-10-28 9083 0.46 474 0.63 1066 1.41 5200 0.31 1674 0.18 669 0.75
44 2023-11-04 9519 0.55 492 0.20 1070 1.96 5218 0.17 1955 0.61 784 1.15
45 2023-11-11 9825 0.60 467 0.21 1256 2.15 5244 0.21 2074 0.63 784 0.89
46 2023-11-18 10315 0.79 500 0.40 1426 2.38 5505 0.36 2180 0.37 704 2.56
47 2023-11-25 10920 1.00 620 0.97 1442 2.57 5715 0.44 2210 0.59 911 2.96
48 2023-12-02 11703 0.91 676 0.89 1585 2.33 5965 0.47 2458 0.49 983 2.34
49 2023-12-09 11654 1.20 668 1.20 1635 2.39 6037 0.61 2513 1.95 746 0.94
50 2023-12-16 12683 1.31 730 1.78 1669 2.52 6707 0.63 2424 1.61 1082 2.77
51 2023-12-23 12659 1.59 768 1.56 1857 2.48 6415 0.78 2361 2.50 1194 2.85
52 2023-12-30 12881 1.76 709 2.26 2006 2.14 6809 0.98 2112 2.27 1181 4.49
1 2024-01-06 13431 2.20 812 1.85 2048 2.15 7012 1.07 2253 3.99 1229 5.78
2 2024-01-13 13207 1.64 924 1.41 1887 1.59 7144 0.62 2053 3.85 1126 4.26
3 2024-01-20 11426 2.20 704 1.56 1837 2.34 6103 1.23 1741 4.19 1003 4.79
4 2024-01-27 11026 2.11 834 1.92 1793 1.78 5678 1.13 1681 4.34 996 4.82
5 2024-02-03 11160 2.27 794 2.39 1831 2.46 5534 1.36 1880 2.87 1085 5.44
6 2024-02-10 10709 2.54 782 2.94 1828 2.63 5191 1.58 1908 2.62 969 7.12
7 2024-02-17 10757 2.82 619 2.91 1864 3.70 5376 2.14 1880 1.91 982 6.62
8 2024-02-24 10426 3.15 632 3.96 1825 2.79 5114 2.62 1818 2.31 979 7.76
9 2024-03-02 10398 3.92 587 3.75 1802 4.99 5157 3.37 1727 2.49 1082 7.30
10 2024-03-09 9914 4.57 483 5.38 1677 5.66 4991 4.49 1695 1.83 1002 7.58
11 2024-03-16 9609 4.89 626 7.67 1301 5.84 5084 4.76 1569 2.04 996 7.13
12 2024-03-23 9212 4.64 592 5.57 1263 5.54 5075 4.89 1464 1.78 777 6.44

Positive enterovirus/rhinovirus (EV/RV) tests

Figure 9: Positive enterovirus/rhinovirus (EV/RV) tests (%) in Canada by region by surveillance week
Figure 9
Figure 9: Positive enterovirus/rhinovirus (EV/RV) tests (%) in Canada by region by surveillance week
Week Week End Can Tests EV/RV% Atl Tests EV/RV% QC Tests EV/RV% ON Tests EV/RV% Pr Tests EV/RV% BC Tests EV/RV%
35 2023-09-02 5345 12.50 362 20.72 N.A. N.A. 3409 10.44 966 14.60 608 15.79
36 2023-09-09 5414 14.85 355 25.35 N.A. N.A. 3423 12.80 1119 16.80 516 17.05
37 2023-09-16 6331 18.29 401 23.69 N.A. N.A. 3887 16.08 1314 22.37 722 19.81
38 2023-09-23 6991 20.25 429 27.51 N.A. N.A. 4365 17.11 1428 25.14 747 24.63
39 2023-09-30 7479 18.52 401 26.43 N.A. N.A. 4948 15.74 1398 22.17 715 25.31
40 2023-10-07 7559 17.45 467 23.55 N.A. N.A. 4853 14.77 1515 20.99 706 23.80
41 2023-10-14 7762 15.74 491 23.01 N.A. N.A. 4915 13.77 1612 16.00 717 23.15
42 2023-10-21 8204 13.12 498 22.09 N.A. N.A. 5298 10.82 1681 13.50 695 22.16
43 2023-10-28 7977 12.52 474 16.03 N.A. N.A. 5227 9.95 1624 15.58 637 23.23
44 2023-11-04 8385 10.83 492 17.07 N.A. N.A. 5218 8.39 1916 12.21 736 20.52
45 2023-11-11 8530 10.70 467 16.70 N.A. N.A. 5244 8.68 2051 10.48 743 21.53
46 2023-11-18 8958 8.64 500 14.20 N.A. N.A. 5506 6.79 2161 8.42 779 18.87
47 2023-11-25 9427 7.62 620 11.94 N.A. N.A. 5716 5.86 2186 7.55 883 15.63
48 2023-12-02 10068 6.79 676 9.76 N.A. N.A. 5970 5.19 2427 6.47 959 15.43
49 2023-12-09 9980 6.00 668 6.74 N.A. N.A. 6046 4.50 2516 6.20 695 17.70
50 2023-12-16 11005 5.90 730 7.81 N.A. N.A. 6708 4.62 2437 4.97 1059 14.45
51 2023-12-23 10800 5.56 768 6.51 N.A. N.A. 6434 3.73 2380 5.88 1154 14.47
52 2023-12-30 10881 4.71 709 5.50 N.A. N.A. 6808 3.30 2155 4.83 1145 12.31
1 2024-01-06 11366 4.80 812 4.43 N.A. N.A. 7012 3.76 2268 5.51 1197 9.69
2 2024-01-13 11322 4.43 924 4.22 N.A. N.A. 7146 3.20 2090 5.07 1089 11.48
3 2024-01-20 9562 4.59 704 4.26 N.A. N.A. 6103 3.16 1749 6.40 968 10.02
4 2024-01-27 9212 4.37 834 4.68 N.A. N.A. 5678 3.12 1695 6.02 961 8.43
5 2024-02-03 9317 5.02 794 5.54 N.A. N.A. 5534 3.27 1918 7.66 1035 9.08
6 2024-02-10 8831 6.26 782 8.82 N.A. N.A. 5191 4.26 1909 7.54 918 12.42
7 2024-02-17 8854 6.18 619 6.30 N.A. N.A. 5376 4.35 1882 8.29 941 12.01
8 2024-02-24 8645 6.21 632 5.85 N.A. N.A. 5114 4.99 1896 7.23 945 10.69
9 2024-03-02 8601 6.48 587 6.30 N.A. N.A. 5157 4.65 1773 7.61 1041 13.74
10 2024-03-09 8229 6.53 483 9.11 - - 4991 4.81 1733 7.56 956 12.45
11 2024-03-16 8299 6.68 626 6.55 - - 5084 5.39 1592 7.35 964 12.03
12 2024-03-23 7986 6.49 592 7.26 - - 5075 5.42 1525 7.02 753 11.95

Positive human coronavirus (HCoV) tests

Figure 10: Positive human coronavirus (HCoV) tests (%) in Canada by region by surveillance week
Figure 10
Figure 10: Positive human coronavirus (HCoV) tests (%) in Canada by region by surveillance week
Week Week End Can Tests HCoV% Atl Tests HCoV% QC Tests HCoV% ON Tests HCoV% Pr Tests HCoV% BC Tests HCoV%
35 2023-09-02 5054 0.28 362 0.00 847 0.47 2230 0.13 1007 0.60 608 0.16
36 2023-09-09 5195 0.42 355 0.56 868 0.81 2285 0.09 1171 0.77 516 0.39
37 2023-09-16 6174 0.23 401 0.50 1053 0.47 2636 0.23 1362 0.00 722 0.14
38 2023-09-23 6796 0.46 429 0.00 1122 0.80 2995 0.40 1503 0.40 747 0.54
39 2023-09-30 7026 0.28 401 0.00 1117 0.45 3325 0.21 1468 0.48 715 0.14
40 2023-10-07 7305 0.26 467 0.21 1178 0.08 3390 0.18 1587 0.25 683 1.02
41 2023-10-14 7435 0.32 491 0.20 1094 0.73 3461 0.12 1672 0.60 717 0.14
42 2023-10-21 7697 0.17 498 0.20 1050 0.48 3707 0.05 1747 0.23 695 0.14
43 2023-10-28 7576 0.38 473 0.42 1065 0.38 3707 0.30 1694 0.53 637 0.47
44 2023-11-04 7754 0.37 476 0.21 1067 0.28 3508 0.43 1967 0.20 736 0.82
45 2023-11-11 8119 0.42 467 0.86 1187 0.51 3607 0.28 2115 0.38 743 0.81
46 2023-11-18 8674 0.65 500 0.20 1324 0.98 3838 0.42 2233 0.99 779 0.51
47 2023-11-25 9069 0.65 620 0.65 1357 0.96 3977 0.55 2232 0.54 883 0.91
48 2023-12-02 9880 0.76 676 0.74 1518 1.05 4241 0.42 2486 0.72 959 1.88
49 2023-12-09 9440 1.12 668 1.20 1523 1.64 4007 0.57 2547 1.33 695 2.30
50 2023-12-16 10458 1.47 730 0.41 1583 1.58 4616 1.47 2470 1.58 1059 1.79
51 2023-12-23 10483 1.77 768 1.30 1765 2.10 4389 1.66 2407 1.58 1154 2.43
52 2023-12-30 10328 2.48 709 1.55 1885 2.97 4422 2.49 2167 2.08 1145 2.97
1 2024-01-06 10903 3.06 812 2.96 1861 2.10 4722 3.37 2311 2.81 1197 3.93
2 2024-01-13 10891 3.19 924 3.03 1719 2.50 5030 3.14 2129 3.85 1089 3.31
3 2024-01-20 9525 3.90 704 5.11 1698 4.18 4360 3.78 1795 3.79 968 3.20
4 2024-01-27 9111 5.19 834 5.28 1640 5.49 3941 5.76 1735 4.27 961 3.95
5 2024-02-03 9137 5.10 794 4.79 1647 5.10 3717 6.27 1944 3.34 1035 4.44
6 2024-02-10 8766 6.80 782 5.37 1653 9.50 3456 7.00 1957 5.01 918 6.21
7 2024-02-17 8846 7.73 619 6.30 1700 8.12 3661 8.96 1925 6.39 941 5.95
8 2024-02-24 8547 8.28 632 7.28 1644 10.28 3417 8.17 1909 7.02 945 8.47
9 2024-03-02 8590 7.09 587 6.47 1643 7.49 3511 8.32 1808 5.53 1041 5.38
10 2024-03-09 8071 6.84 483 4.97 1522 6.96 3342 8.02 1768 5.49 956 5.96
11 2024-03-16 7872 7.22 626 4.95 1153 7.55 3476 8.20 1653 6.84 964 5.39
12 2024-03-23 7442 6.76 592 6.08 1128 5.85 3442 7.35 1527 6.81 753 5.84

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